EXETER — A woman whose remains were discovered inside a burning building in Exeter Thursday died of a homicide, according to the results of an autopsy.

The New Hampshire attorney general's office identified the victim Friday as Amanda “Amy” Warf, a 36-year-old Hampton woman. Police are not releasing Warf's cause of death.

Warf's body was found inside an abandoned concrete plant at 2 Hampton Road on Thursday. Her remains were located by firefighters after the building caught fire shortly before 7 a.m.

The fire broke out inside a roughly 3,000-square-foot facility that has been vacant for at least two decades.

State police documented evidence at the scene for at least five hours, along with officials from the New Hampshire state fire marshal's office.

Early on, police focused their attention on a suspicious vehicle on the property — a gray Hyundai, which was parked in the entryway to the 11.8-acre site.

Caitlyn Lussier, an employee of nearby Access Sports Medicine & Orthopaedics, remembered seeing the car from her office window before the fire began in the morning.

Police surrounded the Hyundai with crime scene tape after the fire was extinguished. They eventually covered the vehicle with a tent — a guard against the wet snow that fell throughout the day.

At about 10 a.m., police were seen speaking with a man in a brown jacket inside the parking lot of Access Sports Medicine, which is located across the street from the concrete plant. He was searched by two officers, though it remains unclear why. Senior Assistant Attorney General Susan Morrell has declined to comment on whether the man is under investigation.

Members of the State Police Major Crime Unit collected evidence inside the concrete plant throughout the day, and also searched parts of the Exeter Recreation Complex next door. They inspected a dumpster on the grounds of the recreation complex at least twice.

Two state troopers also investigated a black Honda sedan that was parked in the Access Sports Medicine parking lot. They scrutinized the car for more than 40 minutes, taking photographs of the interior, exterior, trunk and undercarriage.

Anyone with information regarding the incident is asked to contact New Hampshire State Police at 603-271-3636.